EP1984655B1 - Shift device for a motor vehicle variable transmission - Google Patents
Shift device for a motor vehicle variable transmission Download PDFInfo
- Publication number
- EP1984655B1 EP1984655B1 EP07704204A EP07704204A EP1984655B1 EP 1984655 B1 EP1984655 B1 EP 1984655B1 EP 07704204 A EP07704204 A EP 07704204A EP 07704204 A EP07704204 A EP 07704204A EP 1984655 B1 EP1984655 B1 EP 1984655B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shift
- assistance unit
- servo assistance
- different
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/301—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/301—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action
- F16H2061/302—Hydraulic or pneumatic motors or related fluid control means therefor for power assistance, i.e. servos with follow up action with variable force amplification, e.g. force is depending on selected gear or on actuator force (non-linear amplification)
Definitions
- the invention relates to a switching device with a power assistance device according to the preamble of claim 1.
- the rotational movement of the shift rod is used to preselect the individual shift gates and generally does not require high switching forces.
- the axial longitudinal movement of the shift rod is used to engage the desired gear and requires in particular in transmissions for heavy vehicles and such vehicles whose driver's seat is located away from the transmission, larger shifting forces.
- Previously known servo switching devices are partially mounted directly on the gearbox and have an externally accessible control rod and piston rod.
- the shift linkage is connected to the control rod. Over a longitudinal movement of the control rod, the support is activated.
- This type of control can be found in conjunction with two rod or Jardinzugsclienen.
- the disadvantage here is the sealing of the control and piston rod via bellows and the lack of lubrication. In trucks this place is exposed to heavy pollution.
- switching aids consist of a separate control valve and servo cylinder.
- Valve and cylinder are connected via ball joints with the shift lever and a console, which in turn is attached to the transmission. This arrangement has the additional disadvantage that the parts move relative to the transmission and vehicle frame at each circuit and thus the air lines with which valve and cylinder are connected to each other, can chafe.
- pneumatic switching aids in dissolved construction consist of a mechanical-pneumatic control part and a separate pneumatic power unit.
- a switching aid in dissolved construction is from Loomann; Gear transmission; 2nd Edition; Springer Verlag; 1988; P. 225 known.
- the control part is a mechanically operated control valve, which is actuated by the shift linkage. The transmission of the selection movement during the gear change happens mechanically directly to the transmission. In the transmission of the switching movement, the control valve is actuated and at the same time the manual switching force is transmitted mechanically via a lever to the transmission.
- the manual switching force is additionally supported pneumatically by a pneumatic cylinder.
- This air cylinder forms as a two-position cylinder with integrated hydraulic damper the pneumatic power unit. A direct proportional representation of the manual shift force becomes here not reached.
- the paths between control unit and power unit are long and the installation is space consuming. Damage to the compressed air lines between the control unit and power unit can not be avoided.
- a switching device in which the control valve and the power part is combined in one component.
- the switching power is proportional amplified depending on the driver's switching power and achieves the same effects as in a manual transmission.
- the driver does not lose the feel for the circuit, his sense of whether a gear is engaged or how long the synchronization phase lasts, he can feel directly.
- the controllability of the pneumatic support device remains in need of improvement.
- DE 102004042609 A1 For example, characteristics have become known for a power assist device for a shifting device having different slopes and different proportionalities with respect to the applied manual shifting force. Also the subject of DE 102004042609 A1 should be fully included here.
- a switching device which includes a power assistance device, and whose object is to be included here in full content.
- the DE 19839854 A1 sees a pressure limiting device before, which is provided between a reservoir and the power assistance device.
- the support means supplied compressed air is limited.
- a limitation of the support force is achieved in order to adapt to allowable loads in the components acted upon by the support force.
- a reduction of the synchronous load allows.
- the friction surfaces are not so highly loaded to equalize the speeds in the synchronizers and get a longer service life.
- the targeted adjustment can also be provided in such a way that different levels of assistance are provided in different shift gates.
- the necessary support forces are greater than in the higher gear ratios, which can lead to high synchronous loads at the same level of support either, or on the other hand, insufficient support of the manual shift force.
- a switching device with power assistance device for a transmission of a vehicle has become known with means for selecting and shifting a gear stage of the transmission and with a control rod of the power assistance device, which acts to be supported a manual shift force. Means are provided for altering or limiting the force applied to the control rod of the power assist device prior to initiating the manual shift force to be assisted in the power assist device.
- Such a designed switching device is complicated, expensive and meets the requirement for a variable limitation of the power assistance force only insufficient.
- the invention has for its object to provide a switching device that allows a variable and cost-effective change and limitation of the power assisting force.
- a power assist device for a transmission of a vehicle includes means for selecting and shifting a speed of the transmission and a control rod of the assisting device to which the manual transmission force to be assisted acts.
- means are provided in the switching device in order to change or limit the force acting on the power assistance device manual switching force before the introduction into the power assistance device.
- the means for changing or limiting the acting manual switching force in the arrangement of engaging in the control rod lever are provided.
- the selector shaft acts on the lever via slidably slidable pins, wherein elastic elements are provided in the grooves, which allow the pins to act on edge regions of the grooves at different axial positions along the grooves with a different elasticity, and thus different power-supporting forces ,
- An embodiment provides that juxtaposed elastic elements on the edge region of one side of a groove have different elasticities for imaging different servo-assistance forces in different shift gates of the transmission.
- the elasticities in shift gates with higher gear ratios are greater than with shift gates with lower gear ratios.
- a further embodiment provides that the elastic elements on the edge region of one side of a groove have different elasticities than the elastic elements on the edge region of the opposite side of the groove for imaging different servo-assistance forces at different shift positions in the same shift gate of the transmission.
- the elasticities in shift positions of higher gear ratios are greater than in shift positions of lower gear ratios.
- the elastic elements are formed by Blattfederlemente and in another embodiment by rubber elements.
- the Fig. 1 shows a schematic of the switchgear 2 of a motor vehicle according to the prior art.
- a shift lever 4 from a shift rod 6 via a lever deflection 8 leads to a switching device 11 with a pneumatic power assistance device 10.
- the pneumatic power assistance device 10 has a connecting line 12, which leads to a Reservoir 14 leads, from which the pneumatic power assistance device 10 is supplied with compressed air.
- the lever deflection 8 has a first lever 16, which is preferably articulated to the shift rod 6.
- the lever deflection 8 has a second lever 18, which in turn engages in a control rod 20 which is arranged in the pneumatic power assistance device 10.
- a piston rod 22 is provided, in which a lever 24 engages, which is connected via a rotatable switching shaft 26 with a lever 28 in the vehicle transmission 30.
- the lever 28 engages in a shift rail 32 through which gear ratios of the transmission can be switched in a known manner.
- a movement of the lever 24 is transmitted via the switching shaft 26 in a movement of the lever 28, so that the lever 28 can put the shift rail 32 in an axial movement.
- the shift rail 32 preferably assumes three positions, two axial end positions, each corresponding to a switched gear ratio and lying between the end positions center position corresponding to a neutral position of the transmission.
- the Fig. 2 shows in a plan view a section through the inventive switching device 40.
- a not shown here lever 16 from Fig. 1 is rotatably connected via a toothing 42 with the central shift shaft 44.
- the shift shaft 44 engages through a protective cap 46 on the switching device 40 and is sealed by a shaft seal 48 at its periphery.
- the switching shaft is rotatably mounted about an axis 50 within a hollow shaft 52.
- the hollow shaft 52 is rotatable within the switching device 40 about the axis 50, but arranged axially non-displaceable along the axis 50.
- the switching shaft 44 has grooves 54 provided on its circumference along the axis 50. In these grooves, pins 56 engage, which in turn are rotatably mounted in a lever 18.
- pins 56 are mounted in the lever 18 in needle bushings 58.
- the pins 56 are arranged in the grooves 54 such that an axial displacement of the switching shaft 44th along the axis 50 is made possible, but a rotation of the switching shaft 44 about the axis 50, a pivoting of the lever 18 triggers.
- the rotatable mounting of the pins 56 friction losses between pins 56 and grooves 54 are avoided and it is a smooth axial movement of the shift shaft 44 along the axis 50 possible, even if the shift shaft 44 is acted upon by a torque acting on the pins 56 at the pneumatic power assistance device 10 is supported.
- the lever 18 has a roller 60 rotatably mounted on a pin 62, which engages in the control rod 20 of the pneumatic power assistance device 10. As a result, friction losses between the lever 18 and the control rod 20 are minimized, whereby a low-friction and almost wear-free transmission of the manual switching force to the pneumatic power assistance device 10 can take place.
- the amplifying force generated by the pneumatic power assist device 10 is transmitted from the piston rod 22 to the lever 24 and from there to the hollow shaft 52.
- the hollow shaft 52 has two slots 64. Through these slots 64 pins 66 project through which are fixed to the lever 28 which engages the shift rails 32, not shown here. The pins 66 also project through openings in the shift shaft 44 and rotate the shift shaft 44 and the hollow shaft 52 together.
- the openings are provided such that their inner dimensions are larger than the outer dimensions of the pins 66. This results in a slight torsional backlash between the shift shaft 44 and the hollow shaft 52. This ensures that the control shaft 44 and the lever 18, the pneumatic Servo support device 10 can be controlled without directly the hollow shaft 52 must be rotated by the shift shaft 44 directly. If the adjustment is exceeded on the control rod 20, however, a safe bridging of the pneumatic power assistance device 10 is achieved, for example in case of failure of the support or if at Increased manual switching force this is transmitted directly to the sync.
- the slots 64 in the hollow shaft 52 allow the axial displacement of the shift shaft 44 within the hollow shaft 52 and the lever 28 and thus the unhindered and unamplified selection movement.
- the Fig. 3 shows the switching device in section in side view.
- the pins 56 engage, which are rotatably mounted in needle bushes 58 in the lever 18.
- the switching shaft 44 is enclosed by the hollow shaft 52.
- the lever 18 engages with a roller 60, which is easily rotatably mounted on a bolt 62, in a pocket 70 in the control rod 20 and allows the low-friction transmission of the manual switching force to the pneumatic power assistance device 10th
- Fig. 4 shows the groove 54 in the switching shaft 44.
- the pin 56 is indicated in two different positions, but it is in the groove 54 only once.
- the in the Fig. 4 upper position represents the position of the pin 56 in the shift gate for the 1st and 2nd gear in a 4-speed main gear, while the lower position represents the position of the pin 56 in the shift gate for the 3rd and 4th gear.
- the Fig. 5 shows one of the Fig. 4 Corresponding illustration for a 6-speed main gearbox.
- the second shift position in the uppermost shift gate has an elastic element 84 which has a first damping rate.
- two elastic elements 80 and 82 are provided, for example, have a second and a third damping rate and are more elastic than the first damping rate of the element 84.
- the shift positions for the 5th and 6th gear has, a U-shaped spring element 86 is provided, which is formed even more elastic.
- the Fig. 6 shows a modified representation of the arrangement Fig. 3 ,
- the lever 18 has in its lower end an elastic region on the shaft 88, with which it engages in the control rod 20.
- an elastic region on the shaft 88 By a corresponding design of the shaft 88 on the left side opposite the right side a different elasticity is achieved depending on the direction of rotation, so that different shift positions can be taken into account in a shift gate.
- corresponding elements are provided with the same reference numerals.
- the Fig. 7 shows schematically the course of the servo-assisting force plotted against the manual shift force.
- the characteristic curve 90 which is structurally predetermined in the servo-assistance device, is linear and runs steadily increasing until, at the end of the control range of the servo-assistance device, it transitions into the area of mechanical bridging.
- the curve 92 shows the course initially equal to the break point 94, from which the elasticity acts, up to the break point 96, from which again the mechanical bridging acts.
- the curve 98 shows from the beginning a more subdued course up to the break point 100, from which the mechanical bridging begins to act.
- the power assistance force By limiting the acting switching force and the pressure generated in the power assistance device and thereby the power assistance force can be influenced so that it does not exceed certain values.
- the invention can be dispensed with the arrangement of expensive pressure relief valves according to the prior art and for each synchronization in the transmission, an individual course and an individual limitation of the maximum allowable power assistance force can be achieved.
- One or more gears can be assigned a well-defined elasticity, allowing the power assistance to be adjusted up to the maximum power assistance.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
- Transmission Devices (AREA)
- Control Of Transmission Device (AREA)
Abstract
Description
Die Erfindung betrifft eine Schaltvorrichtung mit einer Servounterstützungseinrichtung nach dem Oberbegriff von Anspruch 1.The invention relates to a switching device with a power assistance device according to the preamble of
Bei derartigen Schaltvorrichtungen dient die Drehbewegung der Schaltstange zur Vorwahl der einzelnen Schaltgassen und erfordert im Allgemeinen keine hohen Schaltkräfte. Die axiale Längsbewegung der Schaltstange dient zum Einlegen des gewünschten Ganges und erfordert insbesondere bei Getrieben für schwere Fahrzeuge und solchen Fahrzeugen, deren Fahrersitz vom Getriebe entfernt angeordnet ist, größere Schaltkräfte.In such switching devices, the rotational movement of the shift rod is used to preselect the individual shift gates and generally does not require high switching forces. The axial longitudinal movement of the shift rod is used to engage the desired gear and requires in particular in transmissions for heavy vehicles and such vehicles whose driver's seat is located away from the transmission, larger shifting forces.
Heutige Nutzfahrzeuge, wie Omnibusse und Lastkraftwagen, weisen mit ihrer Frontlenker-Bauweise räumliche Gegebenheiten für den Einbau des Getriebes auf, bei denen das Getriebe zwangsläufig weit vom Fahrersitz wegdrückt. Besonders weit wird die Entfernung bei Fahrzeugen mit Unterflur- oder Heckmotoren. Durch das lange, bisweilen stramm laufende Schaltgestänge bei mechanisch geschalteten Getrieben wird der exakte Gangwechsel oft erschwert.Today's commercial vehicles, such as buses and trucks, have with their front handlebar design spatial conditions for the installation of the transmission, in which the transmission inevitably pushes far away from the driver's seat. The distance is particularly wide for vehicles with underfloor or rear engines. Due to the long, sometimes tight-running shift linkage in mechanically shifted transmissions, the exact gear change is often difficult.
Damit der Fahrer eines Kraftfahrzeuges seine Aufmerksamkeit voll dem Straßenverkehr zuwenden kann, muss er in allen Tätigkeiten, die zum Führen eines Kraftfahrzeuges notwendig sind, so weit wie möglich entlastet und unterstützt werden.So that the driver of a motor vehicle can turn his attention fully to the traffic, he must be relieved as far as possible and supported in all activities that are necessary for driving a motor vehicle.
Jeder Kraftfahrer weiß, wie entscheidend die einwandfreie Bedienung des Schaltgetriebes in schwierigen Verkehrssituationen sein kann. Pneumatische Schalthilfen für Nutzfahrzeuge aller Größenordnungen können hier Abhilfe schaffen.Every driver knows how crucial the flawless operation of the gearbox can be in difficult traffic situations. Pneumatic switching aids for commercial vehicles of all sizes can remedy this situation.
Bisher bekannte Servoschaltvorrichtungen sind teilweise direkt an das Getriebe angebaut und besitzen eine von außen zugängliche Steuerstange und Kolbenstange. Das Schaltgestänge ist mit der Steuerstange verbunden. Über eine Längsbewegung der Steuerstange wird die Unterstützung aktiviert. Diese Art der Ansteuerung findet man in Verbindung mit zwei Stangen- oder Kabelzugschaltungen. Nachteilig ist hierbei die Abdichtung der Steuer- und Kolbenstange über Faltenbälge und die fehlende Schmierung. Im Lkw ist diese Stelle starker Verschmutzung ausgesetzt. Bei Änderung der Schaltgestängeübersetzung ändert sich auch der Beginn der Servounterstützung bzw. diese muss durch Modifikation des Ventils an die Gestängeübersetzung angepasst werden. Das gleiche gilt auch für Schalthilfen, welche aus einem voneinander getrennten Ansteuerventil und Servozylinder bestehen. Ventil und Zylinder sind über Kugelgelenke mit dem Schalthebel und einer Konsole, welche wiederum am Getriebe befestigt ist, verbunden. Diese Anordnung hat zusätzlich noch den Nachteil, dass sich bei jeder Schaltung die Teile relativ zum Getriebe und Fahrzeugrahmen bewegen und somit die Luftleitungen, mit denen Ventil und Zylinder miteinander verbunden sind, durchscheuern können.Previously known servo switching devices are partially mounted directly on the gearbox and have an externally accessible control rod and piston rod. The shift linkage is connected to the control rod. Over a longitudinal movement of the control rod, the support is activated. This type of control can be found in conjunction with two rod or Kabelzugschaltungen. The disadvantage here is the sealing of the control and piston rod via bellows and the lack of lubrication. In trucks this place is exposed to heavy pollution. When changing the shift linkage also changes the beginning of the power assistance or this must be adapted by modification of the valve to the linkage ratio. The same applies to switching aids, which consist of a separate control valve and servo cylinder. Valve and cylinder are connected via ball joints with the shift lever and a console, which in turn is attached to the transmission. This arrangement has the additional disadvantage that the parts move relative to the transmission and vehicle frame at each circuit and thus the air lines with which valve and cylinder are connected to each other, can chafe.
Es sind derartige pneumatische Schalthilfen in aufgelöster Bauweise bekannt, die aus einem mechanisch-pneumatischen Steuerteil und einem separaten, pneumatischen Kraftteil bestehen. Eine Schalthilfe in aufgelöster Bauweise ist aus Loomann;
Aus der
Aus der
Aus der
Aus der
Die gezielte Einstellung kann auch derart vorgesehen sein, dass in verschiedenen Schaltgassen unterschiedlich hohe Unterstützungskräfte zur Verfügung gestellt werden. So sind in den niedrigen Gangstufen die notwendigen Unterstützungskräfte größer als in den höheren Gangstufen, was bei einer gleich hohen Unterstützung entweder zu hohen Synchronbelastungen führen kann, oder andererseits zu einer nicht ausreichenden Unterstützung der Handschaltkraft.From the
The targeted adjustment can also be provided in such a way that different levels of assistance are provided in different shift gates. Thus, in the low gear ratios, the necessary support forces are greater than in the higher gear ratios, which can lead to high synchronous loads at the same level of support either, or on the other hand, insufficient support of the manual shift force.
Aus der gattungsbildenden
Eine derartig ausgestaltete Schaltvorrichtung ist aufwendig, teuer und erfüllt die Anforderung an eine variable Begrenzung der Servounterstützungskraft nur unzureichend.Such a designed switching device is complicated, expensive and meets the requirement for a variable limitation of the power assistance force only insufficient.
Daher liegt der Erfindung die Aufgabe zugrunde, eine Schaltvorrichtung aufzuzeigen, die eine variable und kostengünstige Veränderung und Begrenzung der Servounterstützungskraft ermöglicht.Therefore, the invention has for its object to provide a switching device that allows a variable and cost-effective change and limitation of the power assisting force.
Die Aufgabe wird gelöst durch eine Schaltvorrichtung mit den Merkmalen von Anspruch 1. Ausgestaltungen sind Gegenstand von Unteransprüchen.The object is achieved by a switching device with the features of
Erfindungsgemäß umfasst eine Schaltvorrichtung mit Servounterstützungseinrichtung für ein Getriebe eines Fahrzeuges Mittel zum Wählen und zum Schalten einer Gangstufe des Getriebes und eine Steuerstange der Unterstützungseinrichtung, auf die die zu unterstützende Handschaltkraft einwirkt. Dabei sind in der Schaltvorrichtung Mittel vorgesehen, um die auf die Servounterstützungseinrichtung einwirkende Handschaltkraft vor der Einleitung in die Servounterstützungseinrichtung zu verändern oder zu begrenzen.According to the invention, a power assist device for a transmission of a vehicle includes means for selecting and shifting a speed of the transmission and a control rod of the assisting device to which the manual transmission force to be assisted acts. In this case, means are provided in the switching device in order to change or limit the force acting on the power assistance device manual switching force before the introduction into the power assistance device.
Erfindungsgemäß sind die Mittel zur Veränderung oder zur Begrenzung der einwirkenden Handschaltkraft in der Anordnung eines in die Steuerstange eingreifenden Hebels vorgesehen. Die Schaltwelle wirkt über in Nuten verschiebbare Stifte auf den Hebel ein, wobei in den Nuten elastische Elemente vorgesehen sind, die ein Einwirken der Stifte auf Randbereiche der Nuten an unterschiedlichen axialen Positionen entlang der Nuten mit einer unterschiedlichen Elastizität, und damit unterschiedlichen servounterstützenden Kräften, ermöglichen.According to the invention, the means for changing or limiting the acting manual switching force in the arrangement of engaging in the control rod lever are provided. The selector shaft acts on the lever via slidably slidable pins, wherein elastic elements are provided in the grooves, which allow the pins to act on edge regions of the grooves at different axial positions along the grooves with a different elasticity, and thus different power-supporting forces ,
Eine Ausgestaltung sieht vor, dass nebeneinander liegende elastische Elemente auf dem Randbereich einer Seite einer Nut unterschiedliche Elastizitäten aufweisen zur Abbildung unterschiedlicher Servounterstützungskräfte in unterschiedlichen Schaltgassen des Getriebes. Dabei fallen in einer Ausführung die Elastizitäten bei Schaltgassen mit höheren Gangstufen größer aus als bei Schaltgassen mit geringeren Gangstufen.An embodiment provides that juxtaposed elastic elements on the edge region of one side of a groove have different elasticities for imaging different servo-assistance forces in different shift gates of the transmission. In one embodiment, the elasticities in shift gates with higher gear ratios are greater than with shift gates with lower gear ratios.
Eine weitere Ausführungsform sieht vor, dass die elastischen Elemente auf dem Randbereich der einen Seite einer Nut andere Elastizitäten aufweisen, als die elastischen Elemente auf dem Randbereich der gegenüberliegenden Seite der Nut zur Abbildung unterschiedlicher Servounterstützungskräfte bei unterschiedlichen Schaltpositionen in der gleichen Schaltgasse des Getriebes. Dabei fallen in einer Ausführung die Elastizitäten bei Schaltpositionen von höheren Gangstufen größer aus als bei Schaltpositionen von geringeren Gangstufen.A further embodiment provides that the elastic elements on the edge region of one side of a groove have different elasticities than the elastic elements on the edge region of the opposite side of the groove for imaging different servo-assistance forces at different shift positions in the same shift gate of the transmission. In one embodiment, the elasticities in shift positions of higher gear ratios are greater than in shift positions of lower gear ratios.
Bei einer vorteilhaften Ausgestaltung sind die elastischen Elemente durch Blattfederlemente gebildet und bei einer anderen Ausgestaltung durch Gummielemente.In an advantageous embodiment, the elastic elements are formed by Blattfederlemente and in another embodiment by rubber elements.
Die Erfindung wird anhand einer Zeichnung näher beschrieben.
Es zeigen:
- Fig. 1
- eine Schaltanlage nach dem Stand der Technik;
- Fig. 2
- einen Schnitt durch die Schaltvorrichtung in einer Ausfüh- rungsform;
- Fig. 3
- einen Schnitt in Vorderansicht in einer anderen Ausfüh- rungsform;
- Fig. 4
- Details einer Ausführungsform nach
Fig. 3 ; - Fig. 5
- Details einer weiteren Ausführungsform;
- Fig. 6
- eine weitere Ausführungsform und
- Fig. 7
- Kennlinienverläufe.
Show it:
- Fig. 1
- a switchgear according to the prior art;
- Fig. 2
- a section through the switching device in an embodiment;
- Fig. 3
- a section in front view in another embodiment;
- Fig. 4
- Details of an embodiment according to
Fig. 3 ; - Fig. 5
- Details of another embodiment;
- Fig. 6
- another embodiment and
- Fig. 7
- Characteristic curves.
Die
Die
Der Hebel 18 weist eine auf einem Bolzen 62 drehbar angeordnete Rolle 60 auf, die in die Steuerstange 20 der pneumatischen Servounterstützungseinrichtung 10 eingreift. Hierdurch werden Reibungsverluste zwischen dem Hebel 18 und der Steuerstange 20 minimiert, wodurch eine reibungsarme und nahezu verschleißfreie Übertragung der Handschaltkraft auf die pneumatischen Servounterstützungseinrichtung 10 erfolgen kann.
Die von der pneumatischen Servounterstützungseinrichtung 10 erzeugte Verstärkungskraft wird von der Kolbenstange 22 auf den Hebel 24 und von dort auf die Hohlwelle 52 übertragen. Die Hohlwelle 52 weist zwei Langlöcher 64 auf. Durch diese Langlöcher 64 ragen Stifte 66 hindurch, die an dem Hebel 28 befestigt sind, der in die hier nicht gezeigten Schaltschienen 32 eingreift. Die Stifte 66 ragen auch durch Öffnungen in der Schaltwelle 44 hindurch und verdrehen die Schaltwelle 44 und die Hohlwelle 52 gemeinsam. Dabei sind die Öffnungen derart vorgesehen, dass ihre Innenausmaße größer ausgebildet sind als die Außenausmaße der Stifte 66. Dadurch ergibt sich ein geringfügiges Verdrehspiel zwischen der Schaltwelle 44 und der Hohlwelle 52. Hiermit ist sichergestellt, dass über die Schaltwelle 44 und den Hebel 18 die pneumatischen Servounterstützungseinrichtung 10 angesteuert werden kann, ohne dass unmittelbar bereits die Hohlwelle 52 von der Schaltwelle 44 mitgedreht werden muss. Wenn der Verstellweg an der Steuerstange 20 überschritten ist, wird jedoch eine sichere Überbrückung der pneumatischen Servounterstützungseinrichtung 10 erreicht, beispielsweise bei Ausfall der Unterstützung oder wenn bei weiter gesteigerter Handschaltkraft diese direkt auf die Synchronisierungen übertragen wird.
Die Langlöcher 64 in der Hohlwelle 52 ermöglichen die axiale Verschiebung der Schaltwelle 44 innerhalb der Hohlwelle 52 und des Hebels 28 und damit die ungehinderte und unverstärkte Wählbewegung.The
The amplifying force generated by the pneumatic
The
Die
In der Schaltwelle 44 sind in der Nut 54 an den Randbereichen elastische Elemente 80 und 82 angeordnet, die von den Stiften 56 bei Verdrehung der Schaltwelle 44 beaufschlagt werden und die dieser Beaufschlagung der Schaltwelle mit der Handschaltkraft elastisch nachgeben. Die
In der unteren Position der
In the lower position of the
Die
Die
Die
Durch die Begrenzung der einwirkenden Schaltkraft kann auch der in der Servounterstützungseinrichtung erzeugte Druck und dadurch die Servounterstützungskraft beeinflusst werden, so dass sie bestimmte Werte nicht überschreitet.
Durch die Erfindung kann auf die Anordnung teurer Druckbegrenzungsventile gemäß dem Stand der Technik verzichtet werden und für jede Synchronisierung im Getriebe kann ein individueller Verlauf und eine individuelle Begrenzung der maximal zulässigen Servounterstützungskraft erzielt werden. Einem oder mehreren Gängen kann eine genau definierte Elastizität zugeordnet werden, wodurch die Servounterstützung bis hin zur maximalen Servounterstützungskraft angepasst werden kann.By limiting the acting switching force and the pressure generated in the power assistance device and thereby the power assistance force can be influenced so that it does not exceed certain values.
By the invention can be dispensed with the arrangement of expensive pressure relief valves according to the prior art and for each synchronization in the transmission, an individual course and an individual limitation of the maximum allowable power assistance force can be achieved. One or more gears can be assigned a well-defined elasticity, allowing the power assistance to be adjusted up to the maximum power assistance.
- 22
- Schaltanlageswitchgear
- 44
- Schalthebelgear lever
- 66
- Schaltstangeshift rod
- 88th
- Hebelumlenkungrelay arm
- 1010
- ServounterstützungseinrichtungServo assistance unit
- 1111
- Schaltvorrichtungswitching device
- 1212
- Anschlussleitungconnecting cable
- 1414
- Vorratsbehälterreservoir
- 1616
- Hebellever
- 1818
- Hebellever
- 2020
- Steuerstangecontrol rod
- 2222
- Kolbenstangepiston rod
- 2424
- Hebellever
- 2626
- Schaltwelleshift shaft
- 2828
- Hebellever
- 3030
- Fahrzeuggetriebevehicle transmissions
- 3232
- Schaltschieneshift rail
- 4040
- Schaltvorrichtungswitching device
- 4242
- Verzahnunggearing
- 4444
- Schaltwelleshift shaft
- 4646
- Schutzkappeprotective cap
- 4848
- WellendichtringShaft seal
- 5050
- Achseaxis
- 5252
- Hohlwellehollow shaft
- 5454
- Nutgroove
- 5656
- Stiftpen
- 5858
- Nadelbüchseneedlecase
- 6060
- Rollerole
- 6262
- Bolzenbolt
- 6464
- LanglochLong hole
- 6666
- Stiftpen
- 7070
- Taschebag
- 8080
- elastisches Elementelastic element
- 8282
- elastisches Elementelastic element
- 8484
- elastisches Elementelastic element
- 8686
- Federelementspring element
- 8888
- Schaftshaft
- 9090
- Kennliniecurve
- 9292
- Kennliniecurve
- 9494
- Knickpunktinflection point
- 9696
- Knickpunktinflection point
- 9898
- Kennliniecurve
- 100100
- Knickpunktinflection point
Claims (7)
- Shifting device (11, 40) with servo assistance unit (10) for a transmission (30) of a vehicle, having means for selecting and for shifting a gear stage of the transmission (30), having a control rod (20) of the servo assistance unit (10), which control rod (20) is acted on by a manual shift force to be assisted, wherein upstream of the point at which the manual shift force to be assisted is introduced into the servo assistance unit (10) there are provided means (80, 82, 84, 86, 88) for varying or limiting the force acting on the control rod (20) of the servo assistance unit (10), with the means (80, 82, 84, 86) for varying or for limiting the acting manual shift force being provided in the arrangement of a lever (18) which engages into the control rod (20), characterized in that a shift shaft (44) acts on the lever (18) via pins (56) which are movable in grooves (54), and elastic elements (80, 82, 84, 86) are provided in the grooves (54), which elastic elements (80, 82, 84, 86) enable the pins (56) to act on edge regions of the grooves (54) with a different elasticity at different axial positions along the grooves (54).
- Shifting device (11, 40) with servo assistance unit (10) according to Claim 1, characterized in that elastic elements (80, 82, 84, 86) situated adjacent to one another on the edge region of one side of a groove (54) have different elasticities in order to realize different damping in different shift slots of the transmission (30).
- Shifting device (11, 40) with servo assistance unit (10) according to Claim 2, characterized in that the elasticities are greater in shift slots with relatively high gear stages than in shift slots with relatively low gear stages.
- Shifting device (11, 40) with servo assistance unit (10) according to Claim 1, characterized in that the elastic elements (80) on the edge region of one side of a groove (54) have different elasticities than the elastic elements (82) on the edge region of the opposite side of the groove (54), in order to realize different damping in different shift positions in the same shift slot of the transmission (30).
- Shifting device (11, 40) with servo assistance unit (10) according to Claim 4, characterized in that the elasticities are greater in shift positions of relatively high gear stages than in shift positions of relatively low gear stages.
- Shifting device (11, 40) with servo assistance unit (10) according to one of Claims 1 to 5, characterized in that the elastic elements (80, 82, 84, 86) are formed by leaf spring elements.
- Shifting device (11, 40) with servo assistance unit (10) according to one of Claims 1 to 5, characterized in that the elastic elements (80, 82, 84, 86) are formed by rubber elements.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006006651A DE102006006651A1 (en) | 2006-02-14 | 2006-02-14 | Switching device for motor vehicle gearbox |
PCT/EP2007/050850 WO2007093494A1 (en) | 2006-02-14 | 2007-01-29 | Shift device for a motor vehicle variable transmission |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1984655A1 EP1984655A1 (en) | 2008-10-29 |
EP1984655B1 true EP1984655B1 (en) | 2011-01-05 |
Family
ID=37944003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07704204A Not-in-force EP1984655B1 (en) | 2006-02-14 | 2007-01-29 | Shift device for a motor vehicle variable transmission |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1984655B1 (en) |
JP (1) | JP2009526955A (en) |
CN (1) | CN101384839A (en) |
AT (1) | ATE494498T1 (en) |
BR (1) | BRPI0707781A2 (en) |
DE (2) | DE102006006651A1 (en) |
WO (1) | WO2007093494A1 (en) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006042211A1 (en) * | 2006-09-08 | 2008-03-27 | Zf Friedrichshafen Ag | Switching device for motor vehicle gearbox |
DE102006048254A1 (en) | 2006-10-12 | 2008-04-17 | Zf Friedrichshafen Ag | Servo support device for motor vehicle change gear |
DE102007048400A1 (en) | 2007-06-06 | 2008-12-11 | Zf Friedrichshafen Ag | Switching device for motor vehicle gearbox |
DE102007048401A1 (en) * | 2007-10-09 | 2009-04-16 | Zf Friedrichshafen Ag | Switching device with servo assistance device |
DE102007055721B4 (en) | 2007-12-06 | 2015-02-19 | Zf Friedrichshafen Ag | Servo support device for motor vehicle change gear |
DE102007055847A1 (en) | 2007-12-18 | 2009-06-25 | Zf Friedrichshafen Ag | Servo support device for motor vehicle change gear |
DE102008000638B4 (en) * | 2008-03-13 | 2022-05-25 | Zf Friedrichshafen Ag | Actuating device for actuating at least one switching device and method for assembling and disassembling the same |
CN102207192B (en) * | 2011-03-15 | 2014-03-12 | 奇瑞汽车股份有限公司 | Automotive transmission gear shift vibration and noise reduction structure |
DE102011014071A1 (en) * | 2011-03-16 | 2012-09-20 | GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) | shift operation |
DE102011015713A1 (en) * | 2011-03-31 | 2012-10-04 | Hoerbiger Automotive Komfortsysteme Gmbh | Pneumatic shift assistance device |
DE102011109585A1 (en) | 2011-08-05 | 2012-03-01 | Daimler Ag | Operating device for motor car gear box of commercial vehicle, has elastic element arranged between shaft profiles, and inelastic element limiting resilient twist between switching lever and shaft by elastic element |
DE102011111913A1 (en) | 2011-08-30 | 2013-02-28 | Daimler Ag | Switching module for manual gear-box of motor vehicle, has switching connection, which is coupled with gearshift arm using elastic element, where switching weight performs relative movement against gearshift arm for reducing shock |
CN202834027U (en) * | 2012-09-27 | 2013-03-27 | 陕西法士特齿轮有限责任公司 | Manipulating mechanism of speed changer |
DE102013208932B4 (en) * | 2013-05-15 | 2019-11-07 | Bayerische Motoren Werke Aktiengesellschaft | manual transmission |
DE102016201719A1 (en) * | 2016-02-04 | 2017-08-24 | Zf Friedrichshafen Ag | switching device |
DE102018104008A1 (en) * | 2018-02-22 | 2019-08-22 | Schaeffler Technologies AG & Co. KG | Method for detecting a gear in a manual transmission in vehicles with a friction clutch |
CN115182992B (en) * | 2022-06-20 | 2023-11-07 | 陕西法士特齿轮有限责任公司 | Gear-engaging power assisting structure of adjusting transmission |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1479525A (en) * | 1966-03-24 | 1967-05-05 | Saviem | Assisted gear change device |
DE3147003C2 (en) * | 1981-11-27 | 1984-04-05 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Mechanical gearshift device |
EP0751322B1 (en) * | 1995-06-26 | 1999-01-07 | Automobiles Peugeot | Vehicle gear selector lever with force sensor |
DE19539472A1 (en) * | 1995-10-24 | 1997-04-30 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle change gearbox - pneumatic shift servo - |
DE19539471A1 (en) * | 1995-10-24 | 1997-04-30 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle change gearbox - pneumatic shift servo - |
JP3474353B2 (en) * | 1996-03-29 | 2003-12-08 | 日産ディーゼル工業株式会社 | Transmission operating device |
DE19900820B4 (en) * | 1998-01-16 | 2013-03-14 | Schaeffler Technologies AG & Co. KG | Power assistance device for a transmission |
DE19839854A1 (en) * | 1998-09-02 | 2000-03-09 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle gearbox |
DE19839850B4 (en) * | 1998-09-02 | 2010-01-28 | Zf Friedrichshafen Ag | Switching device for motor vehicle gearbox |
DE19840052A1 (en) * | 1998-09-02 | 2000-03-09 | Zahnradfabrik Friedrichshafen | Switching device for motor vehicle gearbox |
DE102004042609A1 (en) * | 2004-09-03 | 2006-03-09 | Zf Friedrichshafen Ag | Characteristic for the power assistance device of a switching device |
-
2006
- 2006-02-14 DE DE102006006651A patent/DE102006006651A1/en not_active Withdrawn
-
2007
- 2007-01-29 BR BRPI0707781-5A patent/BRPI0707781A2/en not_active IP Right Cessation
- 2007-01-29 JP JP2008554720A patent/JP2009526955A/en not_active Withdrawn
- 2007-01-29 EP EP07704204A patent/EP1984655B1/en not_active Not-in-force
- 2007-01-29 WO PCT/EP2007/050850 patent/WO2007093494A1/en active Application Filing
- 2007-01-29 CN CN200780005474.3A patent/CN101384839A/en active Pending
- 2007-01-29 DE DE502007006182T patent/DE502007006182D1/en active Active
- 2007-01-29 AT AT07704204T patent/ATE494498T1/en active
Also Published As
Publication number | Publication date |
---|---|
BRPI0707781A2 (en) | 2011-05-10 |
DE102006006651A1 (en) | 2007-08-16 |
WO2007093494A1 (en) | 2007-08-23 |
ATE494498T1 (en) | 2011-01-15 |
JP2009526955A (en) | 2009-07-23 |
EP1984655A1 (en) | 2008-10-29 |
DE502007006182D1 (en) | 2011-02-17 |
CN101384839A (en) | 2009-03-11 |
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